body{
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
}
header{
    text-align: center;
    color: white;
}
.header-biaoti{
    width: 100%;
    height: 90px;
    position: fixed;
    z-index: 2;
    background-color: #4caf50;
}
.header-biaoti p{
    font-size: 15px;
    font-weight: bold;
}
/* 这是头部标题的css */
nav{
    height: 40px;
    position: relative;
    top: 90px;
    background-color: #333;
}
nav a{
    line-height: 40px;
    margin: 0px 15px;
    font-weight: bold;
    color: white;
}
nav a:hover{
    color: #4caf50;
}
/* 这是导航栏的css */
main{
    width: 95%;
    margin: 20px auto;
    margin-bottom: 200px;
    position: relative;
    top: 110px;
}
main section{
    margin: 50px 0px;
}
main h2{
    color: #4caf50;
}
.main-introduce{
    margin: 10px 0px;
}
.main-introduce p{
    width: 95%;
    margin: 20px auto;
    font-size: 15px;
}
/* 这是竞赛介绍的css */
.main-player1{
    width: 90%;
    overflow: hidden;
    margin: 20px auto;
}
.main-player1 div{
    width: 3%;
    height: 40px;
    margin: 10px 0px;
    overflow: hidden;
    float: left;
    border-radius: 10px;
}
.main-player1 p{
    width: 95%;
    height: 40px;
    line-height: 40px;
    margin: 10px 0px;
    float: right;
    font-size: 14px;
}
/* 这是竞赛选手的css */
.main-rule ol{
    width: 93%;
    margin: 20px auto;
}
.main-rule li{
    height: 30px;
    line-height: 30px;
    font-size: 15px;
}
/* 这是比赛规则的css */
.main-achievement table{
    width: 96%;
    margin: 30px auto;
    text-align: center;
}
.main-achievement th{
    width: 20%;
    height: 50px;
}
.main-achievement td{
    width: 20%;
    height: 50px;
}
/* 这是成绩展示的css */
footer{
    width: 100%;
    height: 60px;
    line-height: 30px;
    color: white;
    position: fixed;
    bottom: 0px;
    text-align: center;
    z-index: 2;
    background-color: #4caf50;
}
/* 这是底部的css */